Preparation method of polyethylene glycol diacrylate-based gel electrolyte
A technology of polyethylene glycol diacrylate and gel electrolyte, which is applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of high production cost, low ion conductivity, and environmental pollution, and achieve the goal of reducing pollution Effect
Pending Publication Date: 2020-08-18
中国人民解放军军事科学院防化研究院
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[0004] The purpose of the present invention is to solve the problems of traditional gel electrolytes polluting the environment, high production costs, and low ion conductivity at room temperature, and provide a preparation method for polyethylene glycol diacrylate-based gel electrolytes
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Embodiment 1
[0029] At room temperature, in a glove box full of argon, weigh 2.002g polyethylene glycol diacrylate monomer and 20.001g liquid electrolyte (organic solvent is ethylene carbonate and diethyl carbonate, lithium salt is lithium hexafluorophosphate), place In a glass bottle with a cover; after stirring for 1 h, add 0.751 g of cellulose acetate and 0.203 g of azobisisobutyronitrile and continue stirring for 10 h to obtain a polyethylene glycol diacrylate-based gel electrolyte precursor solution, such as figure 1 As shown; the polyethylene glycol diacrylate-based gel electrolyte precursor solution is placed in an oven at 60°C for heating reaction for 1h, and the polyethylene glycol diacrylate-based gel electrolyte is obtained after thermal polymerization, such as figure 2 shown.
[0030] (1) Ionic conductivity test of polyethylene glycol diacrylate-based gel electrolyte 6
[0031] In the glove box, the polyethylene glycol diacrylate-based gel electrolyte precursor solution in Ex...
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The invention relates to a preparation method of a polyethylene glycol diacrylate-based gel electrolyte, and belongs to the field of lithium battery materials. According to the method, the polyethylene glycol diacrylate is directly used as a polymer matrix material of the gel electrolyte, so that the problems of high production cost, environmental pollution and low ionic conductivity of the traditional gel electrolyte are solved. The method comprises the following steps of uniformly mixing a polyethylene glycol diacrylate monomer and a liquid electrolyte, adding cellulose and an initiator, continuously stirring to obtain a gel electrolyte precursor solution, and carrying out a thermal polymerization reaction on the gel electrolyte precursor solution to obtain the polyethylene glycol diacrylate-based gel electrolyte. The invention provides a new direction for the use of the polyethylene glycol diacrylate in the gel electrolyte, and the prepared gel electrolyte has excellent electrochemical performance and is particularly suitable for large-scale production of the gel electrolyte for the lithium battery.
Description
technical field [0001] The invention relates to a preparation method of polyethylene glycol diacrylate-based gel electrolyte, which belongs to the field of lithium battery materials. Background technique [0002] As an electrochemical device with high energy density, lithium battery occupies a dominant position in the consumer electronics market, especially in portable electronic products such as notebook computers and mobile phones. At the same time, lithium battery also has important application prospects in the rapidly developing field of electric vehicles . Traditional lithium batteries use a liquid electrolyte, which risks leaking, making the battery unsafe. Gel electrolyte is prepared by absorbing a large amount of electrolyte in a polymer matrix. Compared with liquid electrolyte, it has the advantages of no leakage, good thermal stability and flexibility, and provides a new solution for the safety of lithium batteries. s solution. Currently, polymer electrolytes su...
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IPC IPC(8): H01M10/0565H01M10/0525C08F122/20
CPCH01M10/0525H01M10/0565C08F122/20Y02E60/10
Inventor 刘梦邱景义赵鹏程张松通李萌祝夏雨文越华明海王跃陈俊红
Owner 中国人民解放军军事科学院防化研究院